On Tue, Feb 5, 2019, 8:11 AM Maximilian Michels <m...@apache.org wrote: > Good points Cham. > > JSON seemed like the most intuitive way to specify a configuration map. > We already use JSON in other places, e.g. to specify the environment > configuration. It is not necessarily a contradiction to have JSON inside > Protobuf. From the perspective of IO authors, the user-friendliness > plays a role because they wouldn't have to deal with Protobuf. >
It's a good point that JSON will make this more user-friendly for IO transforms authors. Probably we should do a bit of experimentation and keep this experimental in case we hit a performance snag. > > I agree that the configuration format is an implementation detail that > will be hidden to users via easy-to-use wrappers. > > Do we have to support UDFs for expanding existing IO? Users would still > be able to apply UDFs via ParDo on the IO output collections. Generally > speaking, I can see how for cross-language transforms UDF support would > be good. For example, a Combine implementation in Java, where the > combine UDFs come from Python. > I think we should try to support UDFs in the first version unless there's a major blocker that hinders realizing this. Many IO transforms available today expect users to pass UDFs to realize various features (for example, dynamic destinations for BigqueryIO and FileIO, timestamp function for KafkaIO). I think without support for UDFs usability of cross-language transforms feature will be significantly limited. I'm happy to work with you to realize this. Thanks, Cham > I suppose the question is, do we try to solve the general case, or do we > go with a simpler approach for enabling the use of existing IO first? > Lack of IO seems to be the most pressing issue for the adoption of Beam > Python. I imagine that a backwards-compatible incremental support for > cross-language transforms (IOs first, later other transforms) would be > possible. > > -Max > > On 05.02.19 03:07, Chamikara Jayalath wrote: > > > > > > On Fri, Feb 1, 2019 at 6:12 AM Maximilian Michels <m...@apache.org > > <mailto:m...@apache.org>> wrote: > > > > Yes, I imagine sources to implement a JsonConfigurable interface > (e.g. > > on their builders): > > > > JsonConfigurable { > > // Either a json string or Map<String, String> > > apply(String jsonConfig); > > } > > > > In Python we would create this transform: > > > > URN: JsonConfiguredSource:v1 > > payload: { > > environment: environment_id, // Java/Python/Go > > resourceIdentifier: string, // "org.apache.beam.io.PubSubIO" > > configuration: json config, // { "topic" : "my_pubsub_topic" } > > } > > > > > > Thanks Max, this is a great first step towards defining to API for > > cross-language transforms. > > Is there a reason why you would want to use JSON instead of a proto > > here. I guess we'll be providing a more user friendly language wrapper > > (for example, Python) for end-users here, so user-friendliness-wise, the > > format we choose won't matter much (for pipeline authors). > > If we don't support UDFs, performance difference will be negligible, but > > UDFs might require a callback to original SDK (per-element worst case). > > So might make sense to choose the more efficient format. > > > > Also, probably we need to define a more expanded definition (proto/JSON) > > to support UDFs. For example, a payload + a set of parameter definitions > > so that the target SDK (for example, Java) can call back the original > > SDK where the pipeline was authored in (for example, Python) to resolve > > UDFs at runtime. > > > > Thanks, > > Cham > > > > That's more generic and could be used for other languages where we > > might > > have sources/sinks. > > > > > (FWIW, I was imagining PubSubIO already had a translation into > > BeamFnApi protos that fully specified it, and we use that same > > format to translate back out.) > > > > Not that I know of. > > > > On 01.02.19 14:02, Robert Bradshaw wrote: > > > Are you suggesting something akin to a generic > > > > > > urn: JsonConfiguredJavaSource > > > payload: some json specifying which source and which > parameters > > > > > > which would expand to actually constructing and applying that > source? > > > > > > (FWIW, I was imagining PubSubIO already had a translation into > > BeamFnApi > > > protos that fully specified it, and we use that same format to > > translate > > > back out.) > > > > > > On Fri, Feb 1, 2019 at 1:44 PM Maximilian Michels <m...@apache.org > > <mailto:m...@apache.org> > > > <mailto:m...@apache.org <mailto:m...@apache.org>>> wrote: > > > > > > Recaping here: > > > > > > We all agree that SDF is the way to go for future > > implementations of > > > sources. It enables us to get rid of the source interfaces. > > However, > > > SDF > > > does not solve the lack of streaming sources in Python. > > > > > > The expansion PR (thanks btw!) solves the problem of > > > expanding/translating URNs known to an ExpansionService. That > > is a more > > > programmatic way of replacing language-specific performs, > > instead of > > > relying on translators directly in the Runner. > > > > > > What is unsolved is the configuration of sources from a > foreign > > > environment. In my opinion this is the most pressing issue > > for Python > > > sources, because what is PubSubIO worth in Python if you > cannot > > > configure it? > > > > > > What about this: > > > > > > I think it is worth adding a JSON configuration option for > > all existing > > > Java sources. That way, we could easily configure them as > > part of the > > > expansion request (which would contain a JSON configuration). > > I'll > > > probably fork a thread to discuss this in more detail, but > would > > > like to > > > hear your thoughts. > > > > > > -Max > > > > > > On 01.02.19 13:08, Robert Bradshaw wrote: > > > > On Thu, Jan 31, 2019 at 6:25 PM Maximilian Michels > > > <m...@apache.org <mailto:m...@apache.org> > > <mailto:m...@apache.org <mailto:m...@apache.org>> > > > > <mailto:m...@apache.org <mailto:m...@apache.org> > > <mailto:m...@apache.org <mailto:m...@apache.org>>>> wrote: > > > > > > > > Ah, I thought you meant native Flink transforms. > > > > > > > > Exactly! The translation code is already there. The > main > > > challenge > > > > is how to > > > > programmatically configure the BeamIO from Python. I > > suppose > > > that is > > > > also an > > > > unsolved problem for cross-language transforms in > general. > > > > > > > > > > > > This is what https://github.com/apache/beam/pull/7316 > does. > > > > > > > > For a particular source, one would want to define a URN and > > > > corresponding payload, then (probably) a > CompositeTransform in > > > Python > > > > that takes the users arguments, packages them into the > > payload, > > > applies > > > > the ExternalTransform, and returns the results. How to > handle > > > arbitrary > > > > UDFs embedded in sources is still TBD. > > > > > > > > For Matthias' pipeline with PubSubIO we can build > > something > > > > specific, but for > > > > the general case there should be way to initialize a > > Beam IO > > > via a > > > > configuration > > > > map provided by an external environment. > > > > > > > > > > > > I thought quite a bit about how we could represent > expansions > > > statically > > > > (e.g. have some kind of expansion template that could be > > used, at > > > least > > > > in many cases, as data without firing up a separate > > process. May be > > > > worth doing eventually, but we run into the same issues > > that were > > > > discussed at > > > > > > https://github.com/apache/beam/pull/7316#discussion_r249996455 ). > > > > > > > > If one is already using a portable runner like Flink, > > having the job > > > > service process automatically also serve up an expansion > > service for > > > > various URNs it knows and cares about is probably a pretty > > low bar. > > > > Flink could serve up things it would rather get back > > untouched in a > > > > transform with a special flink runner urn. > > > > > > > > As Ahmet mentions, SDF is better solution. I hope it's not > > that far > > > > away, but even once it comes we'll likely want the above > > > framework to > > > > invoke the full suite of Java IOs even after they're > > running on SDF > > > > themselves. > > > > > > > > - Robert > > > > > > > > On 31.01.19 17:36, Thomas Weise wrote: > > > > > Exactly, that's what I had in mind. > > > > > > > > > > A Flink runner native transform would make the > existing > > > unbounded > > > > sources > > > > > available, similar to: > > > > > > > > > > > > > > > > > > > > https://github.com/apache/beam/blob/2e89c1e4d35e7b5f95a622259d23d921c3d6ad1f/runners/flink/src/main/java/org/apache/beam/runners/flink/FlinkStreamingTransformTranslators.java#L167 > > > > > > > > > > > > > > > > > > > > > > > > > On Thu, Jan 31, 2019 at 8:18 AM Maximilian Michels > > > > <m...@apache.org <mailto:m...@apache.org> > > <mailto:m...@apache.org <mailto:m...@apache.org>> > > > <mailto:m...@apache.org <mailto:m...@apache.org> > > <mailto:m...@apache.org <mailto:m...@apache.org>>> > > > > > <mailto:m...@apache.org <mailto:m...@apache.org> > > <mailto:m...@apache.org <mailto:m...@apache.org>> > > > <mailto:m...@apache.org <mailto:m...@apache.org> > > <mailto:m...@apache.org <mailto:m...@apache.org>>>>> wrote: > > > > > > > > > > Wouldn't it be even more useful for the > transition > > > period if > > > > we enabled Beam IO > > > > > to be used via Flink (like in the legacy Flink > > Runner)? In > > > > this particular > > > > > example, Matthias wants to use PubSubIO, which > > is not even > > > > available as a > > > > > native > > > > > Flink transform. > > > > > > > > > > On 31.01.19 16:21, Thomas Weise wrote: > > > > > > Until SDF is supported, we could also add > > Flink runner > > > > native transforms for > > > > > > selected unbounded sources [1]. > > > > > > > > > > > > That might be a reasonable option to unblock > > users that > > > > want to try Python > > > > > > streaming on Flink. > > > > > > > > > > > > Thomas > > > > > > > > > > > > [1] > > > > > > > > > > > > > > > > > > > > > https://github.com/lyft/beam/blob/release-2.10.0-lyft/runners/flink/src/main/java/org/apache/beam/runners/flink/LyftFlinkStreamingPortableTranslations.java > > > > > > > > > > > > > > > > > > On Thu, Jan 31, 2019 at 6:51 AM Maximilian > > Michels > > > > <m...@apache.org <mailto:m...@apache.org> > > <mailto:m...@apache.org <mailto:m...@apache.org>> > > > <mailto:m...@apache.org <mailto:m...@apache.org> > > <mailto:m...@apache.org <mailto:m...@apache.org>>> > > > > > <mailto:m...@apache.org <mailto:m...@apache.org> > > <mailto:m...@apache.org <mailto:m...@apache.org>> > > > <mailto:m...@apache.org <mailto:m...@apache.org> > > <mailto:m...@apache.org <mailto:m...@apache.org>>>> > > > > > > <mailto:m...@apache.org > > <mailto:m...@apache.org> <mailto:m...@apache.org <mailto: > m...@apache.org>> > > > <mailto:m...@apache.org <mailto:m...@apache.org> > > <mailto:m...@apache.org <mailto:m...@apache.org>>> > > > > <mailto:m...@apache.org <mailto:m...@apache.org> > > <mailto:m...@apache.org <mailto:m...@apache.org>> > > > <mailto:m...@apache.org <mailto:m...@apache.org> > > <mailto:m...@apache.org <mailto:m...@apache.org>>>>>> wrote: > > > > > > > > > > > > > I have a hard time to imagine how can > > we map > > > in a > > > > generic way > > > > > > RestrictionTrackers into the existing > > > > Bounded/UnboundedSource, so I would > > > > > > love to hear more about the details. > > > > > > > > > > > > Isn't it the other way around? The SDF > is a > > > > generalization of > > > > > UnboundedSource. > > > > > > So we would wrap UnboundedSource using > > SDF. I'm not > > > > saying it is > > > > > trivial, but > > > > > > SDF offers all the functionality that > > > UnboundedSource > > > > needs. > > > > > > > > > > > > For example, the @GetInitialRestriction > > method > > > would > > > > call split on the > > > > > > UnboundedSource and the restriction > > trackers would > > > > then be used to > > > > > process the > > > > > > splits. > > > > > > > > > > > > On 31.01.19 15:16, Ismaël Mejía wrote: > > > > > > >> Not necessarily. This would be one > > way. Another > > > > way is build an SDF > > > > > > wrapper for UnboundedSource. Probably the > > > easier path > > > > for migration. > > > > > > > > > > > > > > That would be fantastic, I have heard > > about such > > > > wrapper multiple > > > > > > > times but so far there is not any > > realistic > > > > proposal. I have a hard > > > > > > > time to imagine how can we map in a > > generic way > > > > RestrictionTrackers > > > > > > > into the existing > > Bounded/UnboundedSource, so I > > > > would love to hear > > > > > > > more about the details. > > > > > > > > > > > > > > On Thu, Jan 31, 2019 at 3:07 PM > > Maximilian > > > Michels > > > > <m...@apache.org <mailto:m...@apache.org> > > <mailto:m...@apache.org <mailto:m...@apache.org>> > > > <mailto:m...@apache.org <mailto:m...@apache.org> > > <mailto:m...@apache.org <mailto:m...@apache.org>>> > > > > > <mailto:m...@apache.org <mailto:m...@apache.org> > > <mailto:m...@apache.org <mailto:m...@apache.org>> > > > <mailto:m...@apache.org <mailto:m...@apache.org> > > <mailto:m...@apache.org <mailto:m...@apache.org>>>> > > > > > > <mailto:m...@apache.org > > <mailto:m...@apache.org> <mailto:m...@apache.org <mailto: > m...@apache.org>> > > > <mailto:m...@apache.org <mailto:m...@apache.org> > > <mailto:m...@apache.org <mailto:m...@apache.org>>> > > > > <mailto:m...@apache.org <mailto:m...@apache.org> > > <mailto:m...@apache.org <mailto:m...@apache.org>> > > > <mailto:m...@apache.org <mailto:m...@apache.org> > > <mailto:m...@apache.org <mailto:m...@apache.org>>>>>> wrote: > > > > > > >> > > > > > > >> > In addition to have support in > > the runners, > > > > this will require a > > > > > > >> > rewrite of PubsubIO to use the > > new SDF API. > > > > > > >> > > > > > > >> Not necessarily. This would be one > > way. Another > > > > way is build an SDF > > > > > > wrapper for > > > > > > >> UnboundedSource. Probably the easier > > path for > > > > migration. > > > > > > >> > > > > > > >> On 31.01.19 14:03, Ismaël Mejía > wrote: > > > > > > >>>> Fortunately, there is already a > > pending > > > PR for > > > > cross-language > > > > > > pipelines which > > > > > > >>>> will allow us to use Java IO like > > PubSub in > > > > Python jobs. > > > > > > >>> > > > > > > >>> In addition to have support in the > > > runners, this > > > > will require a > > > > > > >>> rewrite of PubsubIO to use the new > > SDF API. > > > > > > >>> > > > > > > >>> On Thu, Jan 31, 2019 at 12:23 PM > > > Maximilian Michels > > > > > <m...@apache.org <mailto:m...@apache.org> > > <mailto:m...@apache.org <mailto:m...@apache.org>> > > > <mailto:m...@apache.org <mailto:m...@apache.org> > > <mailto:m...@apache.org <mailto:m...@apache.org>>> > > > > <mailto:m...@apache.org <mailto:m...@apache.org> > > <mailto:m...@apache.org <mailto:m...@apache.org>> > > > <mailto:m...@apache.org <mailto:m...@apache.org> > > <mailto:m...@apache.org <mailto:m...@apache.org>>>> > > > > > > <mailto:m...@apache.org > > <mailto:m...@apache.org> <mailto:m...@apache.org <mailto: > m...@apache.org>> > > > <mailto:m...@apache.org <mailto:m...@apache.org> > > <mailto:m...@apache.org <mailto:m...@apache.org>>> > > > > <mailto:m...@apache.org <mailto:m...@apache.org> > > <mailto:m...@apache.org <mailto:m...@apache.org>> > > > <mailto:m...@apache.org <mailto:m...@apache.org> > > <mailto:m...@apache.org <mailto:m...@apache.org>>>>>> wrote: > > > > > > >>>> > > > > > > >>>> Hi Matthias, > > > > > > >>>> > > > > > > >>>> This is already reflected in the > > > compatibility > > > > matrix, if you look > > > > > > under SDF. > > > > > > >>>> There is no UnboundedSource > > interface for > > > > portable pipelines. > > > > > That's a > > > > > > legacy > > > > > > >>>> abstraction that will be replaced > > with SDF. > > > > > > >>>> > > > > > > >>>> Fortunately, there is already a > > pending > > > PR for > > > > cross-language > > > > > > pipelines which > > > > > > >>>> will allow us to use Java IO like > > PubSub in > > > > Python jobs. > > > > > > >>>> > > > > > > >>>> Thanks, > > > > > > >>>> Max > > > > > > >>>> > > > > > > >>>> On 31.01.19 12:06, Matthias > > Baetens wrote: > > > > > > >>>>> Hey Ankur, > > > > > > >>>>> > > > > > > >>>>> Thanks for the swift reply. > > Should I change > > > > this in the > > > > > capability matrix > > > > > > >>>>> > > > > > > <https://s.apache.org/apache-beam-portability-support-table> > > > then? > > > > > > >>>>> > > > > > > >>>>> Many thanks. > > > > > > >>>>> Best, > > > > > > >>>>> Matthias > > > > > > >>>>> > > > > > > >>>>> On Thu, 31 Jan 2019 at 09:31, > > Ankur Goenka > > > > <goe...@google.com <mailto:goe...@google.com> > > <mailto:goe...@google.com <mailto:goe...@google.com>> > > > <mailto:goe...@google.com <mailto:goe...@google.com> > > <mailto:goe...@google.com <mailto:goe...@google.com>>> > > > > > <mailto:goe...@google.com > > <mailto:goe...@google.com> <mailto:goe...@google.com > > <mailto:goe...@google.com>> > > > <mailto:goe...@google.com <mailto:goe...@google.com> > > <mailto:goe...@google.com <mailto:goe...@google.com>>>> > > > > > > <mailto:goe...@google.com > > <mailto:goe...@google.com> > > > <mailto:goe...@google.com <mailto:goe...@google.com>> > > <mailto:goe...@google.com <mailto:goe...@google.com> > > > <mailto:goe...@google.com <mailto:goe...@google.com>>> > > > > <mailto:goe...@google.com <mailto:goe...@google.com> > > <mailto:goe...@google.com <mailto:goe...@google.com>> > > > <mailto:goe...@google.com <mailto:goe...@google.com> > > <mailto:goe...@google.com <mailto:goe...@google.com>>>>> > > > > > > >>>>> <mailto:goe...@google.com > > <mailto:goe...@google.com> > > > <mailto:goe...@google.com <mailto:goe...@google.com>> > > > > <mailto:goe...@google.com <mailto:goe...@google.com> > > <mailto:goe...@google.com <mailto:goe...@google.com>>> > > > <mailto:goe...@google.com <mailto:goe...@google.com> > > <mailto:goe...@google.com <mailto:goe...@google.com>> > > > > <mailto:goe...@google.com <mailto:goe...@google.com> > > <mailto:goe...@google.com <mailto:goe...@google.com>>>> > > > > > <mailto:goe...@google.com > > <mailto:goe...@google.com> <mailto:goe...@google.com > > <mailto:goe...@google.com>> > > > <mailto:goe...@google.com <mailto:goe...@google.com> > > <mailto:goe...@google.com <mailto:goe...@google.com>>> > > > > <mailto:goe...@google.com <mailto:goe...@google.com> > > <mailto:goe...@google.com <mailto:goe...@google.com>> > > > <mailto:goe...@google.com <mailto:goe...@google.com> > > <mailto:goe...@google.com <mailto:goe...@google.com>>>>>>> wrote: > > > > > > >>>>> > > > > > > >>>>> Hi Matthias, > > > > > > >>>>> > > > > > > >>>>> Unfortunately, unbounded > reads > > > including > > > > pubsub are not yet > > > > > > supported for > > > > > > >>>>> portable runners. > > > > > > >>>>> > > > > > > >>>>> Thanks, > > > > > > >>>>> Ankur > > > > > > >>>>> > > > > > > >>>>> On Thu, Jan 31, 2019 at > 2:44 PM > > > Matthias > > > > Baetens > > > > > > <baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com> > > > <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com>> > > > > <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com> > > > <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com>>> > > > <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com> <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com>> > > > > <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com> > > > <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com>>>> > > > > > <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com> > > > <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com>> > > > > <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com> > > > <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com>>> > > > <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com> <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com>> > > > > <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com> > > > <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com>>>>> > > > > > > >>>>> > > <mailto:baetensmatth...@gmail.com <mailto: > baetensmatth...@gmail.com> > > > <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com>> > > > > <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com> > > > <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com>>> > > > > > <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com> > > > <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com>> > > > > <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com> > > > <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com>>>> > > > > > > <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com> > > > <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com>> > > > > <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com> > > > <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com>>> > > > > > <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com> > > > <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com>> > > > > <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com> > > > <mailto:baetensmatth...@gmail.com > > <mailto:baetensmatth...@gmail.com>>>>>>> wrote: > > > > > > >>>>> > > > > > > >>>>> Hi everyone, > > > > > > >>>>> > > > > > > >>>>> Last few days I have > been > > > trying to > > > > run a streaming > > > > > > pipeline (code on > > > > > > >>>>> Github > > > > <https://github.com/matthiasa4/beam-demo>) on a > > > > > > Flink Runner. > > > > > > >>>>> > > > > > > >>>>> I am running a Flink > > cluster > > > locally > > > > (v1.5.6 > > > > > > >>>>> > > > > <https://flink.apache.org/downloads.html>) > > > > > > >>>>> I have built the SDK > > Harness > > > > Container: /./gradlew > > > > > > >>>>> > > > :beam-sdks-python-container:docker/ > > > > > > >>>>> and started the > JobServer: > > > /./gradlew > > > > > > >>>>> > > > > :beam-runners-flink_2.11-job-server:runShadow > > > > > > >>>>> > > -PflinkMasterUrl=localhost:8081./ > > > > > > >>>>> > > > > > > >>>>> I run my pipeline with: > > > /env/bin/python > > > > > streaming_pipeline.py > > > > > > >>>>> --runner=PortableRunner > > > > --job_endpoint=localhost:8099 > > > > > > --output xxx > > > > > > >>>>> --input_subscription xxx > > > > --output_subscription xxx/ > > > > > > >>>>> / > > > > > > >>>>> / > > > > > > >>>>> All this is running > > inside a > > > Ubuntu > > > > (Bionic) in a > > > > > Virtualbox. > > > > > > >>>>> > > > > > > >>>>> The job submits fine, > but > > > > unfortunately fails after > > > > > a few > > > > > > seconds with > > > > > > >>>>> the error attached. > > > > > > >>>>> > > > > > > >>>>> Anything I am missing > > or doing > > > wrong? > > > > > > >>>>> > > > > > > >>>>> Many thanks. > > > > > > >>>>> Best, > > > > > > >>>>> Matthias > > > > > > >>>>> > > > > > > >>>>> > > > > > > > > > > > > > > > > > > > > >
